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An elementary substance; a metal which combined with oxygen forms lime. It is of a pale yellow color, tenacious, and malleable. It is a member of the alkaline earth group of elements. Atomic weight

Of or pertaining to oxygen and calcium; as, the oxycalcium light. See Drummond light.

line ketone, CH3COC6H5, which may be obtained by the dry distillation of a mixture of the calcium salts of acetic and benzoic acids. It is used as a hypnotic under the name of hypnone.

for use as an illuminating gas in a number of ways, but chiefly by the action of water on calcium carbide. Its light is very brilliant. Watts.

lor varies from white to gray, green, brown, and black. It is a silicate of magnesium and calcium, with usually aluminium and iron. Some common varieties are tremolite, actinolite, asbestus, edenite, hornblende (the last name being also used as a general term for the whole species). Amphibole is a constituent of many c…

Antimonial powder, a consisting of one part oxide of antimony and two parts phosphate of calcium; -- also called James's powder.

ms or octahedrons with pearly luster on the cleavage surface. It is a hydrous silicate of calcium and potassium.

A lemon-yellow phosphate of uranium and calcium occurring in tabular crystals with basal cleavage, and in micalike scales. H., 2- 2.5. Sp. gr., 3.05-3.19.

olor, occurring massive or crystallized. It is a compound of the carbonates of barium and calcium.

.), the earthy residuum after the calcination of bone, consisting chiefly of phosphate of calcium. -- Bone lace, a lace made of linen thread, so called because woven with bobbins of bone. -- Bone oil, an oil obtained by, heating bones (as in the manufacture of bone black), and remarkable for containing the nitrogenou…

A white or gray crystalline mineral consisting of the acid phosphate of calcium.

A liquid ketone obtained by heating calcium butyrate.

Partaking of the nature ofcalcite or calcium carbonate; consisting of, or containg, calcium carbonate or carbonate of lime. Clcareous spar. See as Calcite.

Pertaining to, derived from, or containing, calcium or lime.

rm, or to become, a calx or earthlike substance on being oxidized or burnt; as magnesium, calcium. etc.

xpulsion of some volatile matter, as when carbonic and acid is expelled from carbonate of calcium in the burning of limestone in order to make lime.

Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble. Called also calc-spar and calcareous spar.

A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as common limestone.

um, sal ammoniac. -- Chloride of lime, bleaching powder; a grayish white substance, CaOClcalcium hypochlorite. See Hypochlorous acid, under Hypochlorous. -- Mercuric chloride, corrosive sublimate.

A whitish marble, from Rome, containiing pale greenish zones. It consists of calcium carbonate, with zones and cloudings of talc.